[v1.15] Kill gesture docs

[hamishwillee]

This add docs and release note for the kill gesture added in https://github.com/PX4/PX4-Autopilot/pull/18509.

@MaEtUgR Can you please sanity check this. I am assuming, for example, that this applies to all frame types.

FWIW I think the difference between disarm, kill, and flight termination need to be clarified. My understanding is that

• arm - means powered and enabled.
• disarm - means motors unpowered (and by definition disabled)
• "kill" means turn off the motors, but you're still armed - so motors are powered but disabled.
• "flight termination" means motors are turned off but other outputs locked to certain values - so this is like kill but you also might deploy a parachute.

Is that about right? The reason I find it confusing is that there are so many things that seem to achieve "kind of" the same thing. As a user, should I disarm? Should I kill? Should I flight terminate? Why? When?

To me kill and disarm previously meant recoverable and unrecoverable motors off. Now you've added a kill gesture that isn't recoverable I don't know why you wouldn't just disarm? Then why not a flight termination switch so I can deploy a parachut.?

• [ ] When this goes in, push to main too.

[DronecodeBot]

This pull request has been mentioned on Discussion Forum for PX4, Pixhawk, QGroundControl, MAVSDK, MAVLink. There might be relevant details there:

https://discuss.px4.io/t/px4-v1-15-public-changes-what-needs-docs/39850/5

[DronecodeBot]

This pull request has been mentioned on Discussion Forum for PX4, Pixhawk, QGroundControl, MAVSDK, MAVLink. There might be relevant details there:

https://discuss.px4.io/t/px4-v1-15-public-changes-what-needs-docs/39850/1

[hamishwillee]

@MaEtUgR Can you please sanity check this?

[github-actions[bot]]

/en/releases/1.15.md

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